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XXI. On the distribution of the Charlonia group of the 

 genus Anthocharis. By Geokge T. Baker, F.L.S. 



[Kead September 4th, 1889.J 



This small division of desert species of the genus Antho- 

 charis, forming a very natural and closely allied group, 

 presents many points of interest, both in their relation- 

 ship to each other and in their geographical distribution. 

 They are only six in number, but range from the Canaries 

 on the west to the Valley of the Indus in the east, and 

 though found in such places as Lambessa in Algeria, and 

 Malatia in Armenia, cannot be considered as otherwise 

 than desert insects, being always found in the vicinity of 

 country having either desert or semi-desert charac- 

 teristics. They form of themselves two natural sub- 

 groups, viz., white and yellow, the species of which I 

 will tabulate and describe thus : — 



Yellow. 



Charlonia, Donzel. Algeria ; 

 Tunis ; Fortaventura. 



Y&Y. Mesopotamica, Stgr. Ma- 

 latia (Asia Minor). 



Lucilla, Butler, India (N.W. 

 Punjab). 



White. 

 Penia, Frr. Asia Minor ; Cas- 

 pian district. 

 Tomyris, Chr. Askhabad. 

 Pechi, Stgr. Algeria. 



Charlonia, Donz. 



The fore wings are pale lemon-yellow, with the blackish discoidal 

 spot of an irregular quadrangular shape. The apical patch varies 

 in hue from brownish to almost black, likewise in extent ; it is of 

 a somewhat hollowed (internally) triangular shape, with the usual 

 transverse spotted band more or less developed; costa pinkish, 

 with rosy fringes. The hind wings are of the same lemon hue, 

 but with the dark greenish under side showing through. Fringes 

 whitish. Base of all the wings dark grey. Beneath the fore 

 wings are pale yellowish, with the discoidal spot smaller and reni- 

 form in shape. The apical patch is greenish yellow, of the same 

 shape and dimensions as the upper surface. Costa and fringes 



TRANS. ENT. SOC. LOND. 1889. — PART IV. (DEC.) 



